3668 Paradise Dr
Tiburon 94920 · Unincorporated Tiburon · Unincorporated Marin · Coordinates: 37.89606, -122.46251
Executive Verdict · Public-Records Synthesis
Zoned RSP-1-BFC in Unincorporated Marin with likely ADU & SB 9 infill eligibility and mapped CAL FIRE moderate fire hazard severity zone (state responsibility area) due diligence; benchmark value $3,347,000 ($2,945,000–$3,749,000).
Upsides & Opportunities
- ✓ ADU & SB 9 infill pathways screen as likely eligible
Zoned RSP-1-BFC supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 49,746 sq ft lot.
Source: Unincorporated Marin zoning · CA Gov. Code 66314 & 65852.21
- ✓ Documented permitted upgrades (+$22,682 contributory est.)
Public building records show issued construction/renovation work on this parcel (7 total permits, latest Feb 26, 2024).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (parcel APN)
Watchouts & Due Diligence
- ! Mapped flood awareness zone (Zone X: minimal flood hazard)
all of the lot of the parcel intersects Zone X: minimal flood hazard. Outside mandatory federal SFHA insurance rules, but check local drainage and finished-floor requirements.
Source: FEMA National Flood Hazard Layer (parcel polygon)
- ! CAL FIRE Moderate Fire Hazard Severity Zone (State Responsibility Area) (all of the lot of lot)
Located in a mapped Fire Hazard Severity Zone. Expect Chapter 7A ignition-resistant building standards, defensible-space inspections, and stricter property insurance underwriting.
Source: CAL FIRE FHSZ (map Apr 1, 2024)
- ! Delayed or open permit activity on this parcel
Plumbing / water heater / sewer (171931): Issued after 3 mo — slower than 90% of plumbing / water heater / sewer permits in Unincorporated Marin (median 0d, 90th pct 0d, n=2,211).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (review-time benchmark)
- ! 5 slow or stalled nearby projects within ½ mile
Closest lead: New home at 3820 Paradise Dr (0.39 mi W, applied). Inspect timeline history before assuming near-term completion.
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · HCD APR (½-mile radius)
Parcel & Assessor
- Lot size:
- 49,746 sq ft (1.14 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 3668 PARADISE DR
Zoning & Land Use
RSP-1-BFC — Residential Single Family Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RSP-1-BFC (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned RSP-1-BFC, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned RSP-1-BFC, a single-family residential zone. The lot is 49,746 sq ft by the assessor, room for two lots of at least 1,200 sq ft, each at least 40% of the original.
Mapped Hazard Zones on This Lot
- CAL FIRE Fire Hazard Severity Zone
- Moderate Fire Hazard Severity Zone (State Responsibility Area) (all of the lot, map Apr 1, 2024)
- FEMA National Flood Hazard Layer
- Zone X: minimal flood hazard (all of the lot) · FIRM panel 06041C0489E, effective March 16, 2016
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $2,945,000 – $3,749,000 · Status: Off market
HUD Small Area FMR (ZIP 94920) · FY 2026
Studio $2,820 · 1BR $3,380 · 2BR $4,100 · 3BR $5,230 · 4BR $5,420
Developments Deserving Closer Investigation & Active Area Builders
- New home at 3820 Paradise Dr (Applied)0.39 mi W
In "Applied" for 5.4 yr (since Jun 23, 2021), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121). High-impact scale (1 housing unit, $3,800,000 declared valuation across 1 permit).
- Plumbing / water heater / sewer (171931) (Issued)On this parcel
Issued after 3 mo — slower than 90% of plumbing / water heater / sewer permits in Unincorporated Marin (median 0d, 90th pct 0d, n=2,211).
- Accessory dwelling unit at 3820 Paradise Dr Lot (Issued)0.33 mi W
Active in "Issued" for 2.3 yr (first record Aug 8, 2024) with no new permit activity recorded in 16 mo. High-impact scale (1 housing unit, $1,900,000 declared valuation across 1 permit).
- New home at 3880 Paradise Dr (Issued)0.35 mi NW
Active in "Issued" for 12.7 yr (first record Feb 13, 2014) with no new permit activity recorded in 11.4 yr. High-impact scale (1 housing unit, $2,240,000 declared valuation across 2 permits).
Entity-resolved builders & contractors in ½ mile: Sunpower (2 on parcel, 2 in ½ mi · Solar / battery storage); Von Der Werth (2 on parcel, 2 in ½ mi · Addition (adds square footage)); Von Der Werth Eric Construction (2 on parcel, 2 in ½ mi · General repair); Hadley General Contractors (1 on parcel, 1 in ½ mi · Plumbing / water heater / sewer); Zamgen Construction (4 in ½ mi · New garage / accessory structure).
Permit & Project History on This Parcel (7 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B37130 | Solar / battery storage | Issued | Iss. Feb 26, 2024 | $28,700 | INSTALLATION OF ROOF MOUNTED PV SYSTEM - 10.85 KW(31 MODULES) WITH (N)13 kWh SUNVAULT ENERGY STORAGE SYSTEM |
| 171931 | Plumbing / water heater / sewer | Issued | Iss. Jul 18, 2022 | $54,390 | Remodel Outdoor Kitchen |
| 157872 | General repair | Issued | Iss. Mar 8, 2018 | $5,000 | Ret Wall |
| 157871 | New garage / accessory structure | Issued | Iss. Mar 8, 2018 | $10,000 | Cabana***Expiored T.D. 1/17/18 |
| 153672 | Solar / battery storage | Issued | Iss. Nov 1, 2016 | $51,000 |